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156-60-5

Name TRANS-1,2-DICHLOROETHYLENE
CAS 156-60-5
EINECS(EC#) 205-860-2
Molecular Formula C2H2Cl2
MDL Number MFCD00062942
Molecular Weight 96.94
MOL File 156-60-5.mol

Chemical Properties

Appearance 1,2-Dichloroethylene exists in three isomers, sym-, cis-60% and trans-40%. There are variations in toxicity between these two forms. At room temperature, these chemicals are colorless liquids with a slightly acrid, ethereal odor. The Odor Threshold in air is 17 ppm. sym-isomer:
Melting point  −57 °C(lit.)
Boiling point  48-60 °C(lit.)
density  1.257 g/mL at 25 °C(lit.)
vapor pressure  5.32 psi ( 20 °C)
refractive index  n20/D 1.447(lit.)
Fp  43 °F
storage temp.  Refrigerator
solubility  Miscible with acetone, ethanol, and ether and very soluble in benzene and chloroform (U.S. EPA, 1985)
form  Liquid
color  Clear colorless
Stability: Incompatible with oxidizing agents, bases. Stable, but may decompose on exposure to air, moisture or light. Highly flammable.
explosive limit 12.8%
Water Solubility  Miscible with ethanol, ethyl ether, acetone, benzene and chloroform. Immiscible with water.
Merck  14,92
BRN  1420761
Henry's Law Constant 10.12 at 30 °C (headspace-GC, Sanz et al., 1997)
Dielectric constant 2.27
Exposure limits OSHA PEL: TWA 200 ppm (790 mg/m3); ACGIH TLV: TWA 200 ppm (adopted).
LogP 2.06
CAS DataBase Reference 156-60-5(CAS DataBase Reference)
EPA Substance Registry System trans-1,2-Dichloroethylene (156-60-5)

Safety Data

Hazard Codes  F,Xn,T
Risk Statements 
R11:Highly Flammable.
R20:Harmful by inhalation.
R52/53:Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
R39/23/24/25:Toxic: danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed .
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed .
Safety Statements 
S7:Keep container tightly closed .
S16:Keep away from sources of ignition-No smoking .
S29:Do not empty into drains .
S61:Avoid release to the environment. Refer to special instructions safety data sheet .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S36/37:Wear suitable protective clothing and gloves .
RIDADR  UN 1150 3/PG 2
WGK Germany  2
RTECS  KV9400000
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29032990
Safety Profile
Moderately toxic by ingestion. Mddly toxic by inhalation. Human systemic effects by inhalation: sleep, hallucinations, and distorted perceptions. Experimental reproductive effects. A skin and eye irritant. Mutation data reported. Exposure to high vapor concentration can cause nausea, vomiting, weakness, tremor, and cramps. Recovery is usually prompt following removal from exposure. Dermatitis may result from defatting action on skin. Dangerous fire hazard when exposed to heat, flame, or oxidtzers. Moderate explosion hazard in the form of vapor when exposed to flame. Violent reaction with difluoromethylene dihypofluorite. Forms shock-sensitive explosive mixtures with dinitrogen tetraoxide. Reaction with solid caustic alkahes or their concentrated solutions produces chloracetylene gas that ignites spontaneously in air. Reacts violently with N2O4, KOH, Na, NaOH. Moderate explosion hazard in the form of vapor when exposed to flame. Can react vigorously with oxidizing materials. To fight fire, use water spray, foam, CO2, dry chemical. When heated to decomposition it emits toxic fumes of Cl-. See also CHLORIDES; CHLORINATED HYDROCARBONS, ALIPHATIC; and ACETYLENE COMPOUNDS.
Hazardous Substances Data 156-60-5(Hazardous Substances Data)
Toxicity
LD50 in rats (ml/kg): 1.0 orally; 60 i.p.; in mice (ml/kg): 3.2 i.p. (Freundt)

Hazard Information

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